Page C. Valentine
2018
Navigation data collected on Stellwagen Bank during U.S. Geological Survey field activity 2017-043-FA, aboard the R/V Auk, Aug. 22 and 23, 2017 (geographic, WGS84)
1.0
tabular digital data
data release
DOI:10.5066/P9A57QWI
Woods Hole Coastal and Marine Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
https://doi.org/10.5066/P9A57QWI
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-043-FA/
Page C. Valentine
VeeAnn A. Cross
2018
Sea-Floor Sediment Samples, Seabed Imagery, and CTD Instrument Data Collected on Stellwagen Bank in August 2017, U.S. Geological Survey Field Activity 2017-043-FA
1.0
data release
DOI:10.5066/P9A57QWI
Reston, VA
U.S. Geological Survey
Suggested citation: Valentine, P.C., and Cross, V.A., 2018, Sea-floor sediment samples, seabed imagery, and CTD instrument data collected on Stellwagen Bank in August 2017, U.S. Geological Survey Field Activity 2017-043-FA: U.S. Geological Survey data release, https://doi.org/10.5066/P9A57QWI.
https://doi.org/10.5066/P9A57QWI
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-043-FA/
This field activity is part of an effort to map geologic substrates of the Stellwagen Bank National Marine Sanctuary region off Boston, Massachusetts. The overall goal is to develop high-resolution (1:25,000-scale) interpretive maps, based on multibeam sonar data and seabed sampling, showing surficial geology and seabed sediment dynamics. The data collected in this study will aid research on the ecology of fish and invertebrate species that inhabit the region. On August 22 and 23, 2017, the U.S. Geological Survey, in collaboration with the Stellwagen Bank National Marine Sanctuary, conducted a research cruise aboard the Sanctuary’s Research Vessel Auk, visiting 39 locations within the sanctuary. A customized Van Veen grab sampler (SEABOSS) equipped with a video camera and a conductivity, temperature, and depth (CTD) instrument was deployed in drift mode to collect sediment for grain-size analysis, video imagery of the seabed, and measurements of water column properties.
These data are provided as an archive of the navigation data files acquired during the survey in the original collected format as well as in reformatted CSV and XLSX formats. The reformatted files add additional information, and most significantly provide that navigation in decimal degrees.
Additional information regarding this field activity is available from https://cmgds.marine.usgs.gov/fan_info.php?fan=2017-043-FA.
The bounding coordinates presented in this metadata file are for the navigation as a whole. The raw navigation files include transit locations. The reformatted navigation excludes the transits and therefore has the reduced bounds of:
West Bounding Coordinate: -70.41192
East Bounding Coordinate: -70.22456
North Bounding Coordinate: 42.19542
South Bounding Coordinate: 42.08368
20170822
20170823
ground condition of when data were collected.
None planned
-70.720810
-70.224550
42.202700
42.046210
USGS Metadata Identifier
USGS:e210eae0-f09b-488d-9779-f5ede9f9447e
None
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
Woods Hole Coastal and Marine Science Center
WHCMSC
navigation
National Oceanic and Atmospheric Administration
NOAA
ISO 19115 Topic Category
oceans
location
USGS Thesaurus
navigational data
None
North America
United States
Massachusetts
Atlantic Ocean
Stellwagen Bank
Stellwagen Bank National Marine Sanctuary
SBNMS
Massachusetts Bay
None.
None.
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
The navigation was downloaded at the end of the cruise and is available in the original GPGGA format as well as reformatted for easier use. The filenames indicate the cruise and day of navigation. The reformatted version of the navigation excludes the transit navigation between the port and the study area. The original GPGGA navigation filenames are in the format AUK2017043_XXXX_UTC_nav_raw.csv where XXXX is the day of navigation (for example 22aug2017). The filenames of the reformatted navigation are in the format AUK2017043_station_nav_log_XXXX_UTC where XXXX is the day of navigation (for example 22AUG2017); the filename suffix is either XLSX or CSV.
The raw navigation files (with the $GPGGA string) represent all the navigation acquired on the cruise. These files are the orignal files handed over to the scientist. The reformatted navigation files have removed the transit navigation to and from port to the study area. Of note - duplicate navigation fixed (same time and fix) that occur in the navigation files have not been removed. Both the original navigation and the reformatted navigation have duplicates.
The location information was acquired from a satellite navigation receiver (Furuno satellite compass SC-30, GPS receiver) at two second intervals with a horizontal accuracy of 10 m. The navigation antenna is located 5.3 m forward of the SEABOSS deployment location. This offset was not accounted for in the navigation acquisition (navigation fixes represent antenna location).
General file description:
The files *_raw.csv are the $GPGGA strings of the raw navigation recorded on the ship each day. $GPGGA is a National Marine Electronics Association (NMEA) GPS string or sentence that indicates Global Positioning System fix data.
The format of the columns of information are as follows:
$GPGGA, UTC time, latitude (DDMM.MMMM), latitude hemisphere, longitude (DDMM.MMMM), longitude hemisphere.
The first row in each file describes the file.
2017
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
The $GPGGA strings have the latitude/longitude in the decimal minute format DDMM.MMMMM with the hemisphere indicated (N for North and W for West). These data were brought into an Excel (version 2013) spreadsheet and converted to decimal degrees using the following formula examples:
Latitude: (4211.9672-4200)/60+(42) to give 42.19945 decimal degrees.
Longitude: ((7043.2105-7000)/60+70)*-1 to give -70.72018 decimal degrees with negative for western hemisphere.
Additional fields of information were added to the spreadsheet and are defined in the entity and attribute section, as well as within header information in each spreadsheet. The navigation was downloaded at the end of the cruise and is available in the original GPGGA format as well as reformatted for easier use. The filenames indicate the cruise and day of navigation. The reformatted version of the navigation excludes the transit navigation between the port and the study area. The original GPGGA navigation filenames are in the format AUK2017043_XXXX_UTC_nav_raw.csv where XXXX is the day of navigation (for example 22aug2017). The filenames of the reformatted navigation are in the format AUK2017043_station_nav_log_XXXX_UTC where XXXX is the day of navigation (for example 22AUG2017); the filename suffix is either XLSX or CSV.
2017
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
The spreadsheet was opened in Excel (2013). The first row (the explanation header) and the second row (descriptive column headers) were deleted and the third row (brief column headers that are compatible with importing the data into a GIS) was retained. Then the spreadsheet was exported as an MS-DOS CSV file.
2017
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
Added keywords section with USGS persistent identifier as theme keyword.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
Mailing and Physical
384 Woods Hole Road
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
Point
0.00001
0.00001
Decimal degrees
D_WGS_1984
WGS_1984
6378137.000000
298.257224
navigation log in an Excel spreadsheet format
Each Excel spreadsheet has a header (in row 1) explaining the columns of information, row 2 has the header names, and row 3 has header names that are appropriate for incorporation into a GIS (shorter names, no punctuation) and the remaining rows contain the data in 11 columns.
U.S. Geological Survey
VESSEL
Vessel name: The name of the ship that the field activity used for the cruise. The R/V Auk is the Stellwagen Bank National Marine Sanctuary research vessel - a 50-foot catamaran.
U.S. Geological Survey
Text field.
CRUISE_ID
WHCMSC field activity number: The field activity number assigned to the cruise by the Woods Hole Coastal and Marine Science Center. The number is in the format YYYY-XXX where YYYY is the year and XXX is the activity number in that year.
U.S. Geological Survey
Text field.
UTC_DATE
Date, UTC: The date of the row of data collection based on UTC (coordinated universal time) time. In the Excel spreadsheet, the date has the format of D-M-YYYY where D is the numeric day of the month, M is the month abbreviation, and YYYY is the year.
U.S. Geological Survey
Text field.
UTC_JD
Julian Day, UTC: Julian day is the integer number representing the interval of time in days since January 1 of the year of collection.
U.S. Geological Survey
Text field presented as a number.
TIMEZONE
Study area time zone: The time zone in which the study area is located.
U.S. Geological Survey
EDT
Eastern Daylight Time. To derive EDT, subtract 4 hours from the UTC time.
U.S. Geological Survey
UTC_TIME
Time, UTC, HHMMSS: The time of the navigation fix in the format HHMMSS where HH is hour, MM is minutes, and SS is seconds. The times are UTC (coordinated universal time).
U.S. Geological Survey
Number represented as a text field.
DDMM_LAT
Lat N, DDMM.MMMM: The latitude coordinate in the format DDMM.MMMM where DD is degrees and MM.MMMM is decimal minutes. The "N" refers to northern latitude.
U.S. Geological Survey
Text field presented as a number.
DDMM_LON
Lon W, DDMM.MMMM: The longitude coordinate in the format DDMM.MMMM where DD is degrees and MM.MMMM is decimal minutes. The "W" refers to western longitude and serves the place of having a negative value.
U.S. Geological Survey
Number represented as a text field.
LATITUDE
Lat N, decimal degrees: The latitude coordinate in decimal degrees. The "N" refers to northern latitude.
U.S. Geological Survey
42.08368
42.1952
decimal degrees
LONGITUDE
Lon W, decimal degrees: The longitude coordinate in decimal degrees. The "W" refers to western longitude and serves the same purpose as the values being negative.
U.S. Geological Survey
-70.41192
-70.22456
decimal degrees
AREA
Region: The area of the survey.
U.S. Geological Survey
SBNMS
Stellwagen Bank National Marine Sanctuary
U.S. Geological Survey
The attribute label is the abbreviated label in row three of the Excel spreadsheet that is more compatible with importing the dataset into a GIS. The first part of the attribute definition is the longer label of the column that is in the second row of the Excel spreadsheet.
The Excel spreadsheet has the following information in the first row describing the spreadsheet.
GPS navigation log: Column A, vessel name, AUK, SBNMS research vessel; column B, field activity number; column C, date, UTC; column D, Julian Day, UTC; column E, study area time zone; column F, time, UTC (for Eastern Daylight Time subtract 4 hours); column G, latitude north, degrees and decimal minutes; column H longitude west, degrees and decimal minutes; column I, latitude north, decimal degrees; column J, longitude west, decimal degrees; column K, geographic region [abbreviations: D, degrees; H, hour; M, minute; S, second; EDT, Eastern Daylight Time; lat, latitude; lon, longitude; WHCMSC, USGS Woods Hole Coastal and Marine Science Center; SBNMS, Stellwagen Bank National Marine Sanctuary; UTC, coordinated universal (Greenwich Mean Time, ZULU time); GPS, satellite-based Global Positioning System receiver]
The columns of data are the same as represented in the entity and attribute detail information.
The files with the same prefix name, but the CSV extension are exported from the Excel spreadsheet, minus the first two rows of information.
The LATITUDE and LONGITUDE range of values are the values for the reformatted data that does not include transits. These values differ from the spatial domain bounding coordinates which represent the complete dataset - including the raw navigational data which contains the transit locations.
The *_raw.csv files are the original $GPGGA strings off the ship. The format of the columns of information are as follows:
$GPGGA, UTC time, latitude (DDMM.MMMM), latitude hemisphere, longitude (DDMM.MMMM), longitude hemisphere.
The first row in each file describes the file.
U.S. Geological Survey
U.S. Geological Survey
Page C. Valentine
Research Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
USA
(508) 548-8700 x2239
(508) 457-2310
pvalentine@usgs.gov
2017-043-FA_nav.zip contains the navigation acquired on the cruise. The following files are the original $GPGGA navigation: AUK2017043_22aug2017_UTC_nav_raw.csv, AUK2017043_23aug2017_UTC_nav_raw.csv. The reformatted navigation are available in XLSX format and CSV. The files are as follows: AUK2017043_station_nav_log_22AUG2017_UTC.xlsx, AUK2017043_station_nav_log_22AUG2017_UTC.csv, AUK2017043_station_nav_log_23AUG2017_UTC.xlsx, AUK2017043_station_nav_log_23AUG2017_UTC.csv. In addition to the navigation files, the zip file contains the FGDC CSDGM metadata in TXT, XML, and HTML formats.
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
XLSX
Excel 2013
The zip file contains the navigation in XLSX and CSV formats, along with the FGDC CSDGM metadata.
2
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-043-FA/data/navigation/2017-043-FA_nav.zip
https://doi.org/10.5066/P9A57QWI
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-043-FA/
The first link is to download the data in a zip file. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation of the publication.
CSV
The zip file contains the navigation in XLSX and CSV formats, along with the FGDC CSDGM metadata.
2
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-043-FA/data/navigation/2017-043-FA_nav.zip
https://doi.org/10.5066/P9A57QWI
https://cmgds.marine.usgs.gov/data/field-activity-data/2017-043-FA/
The first link is to download the data in a zip file. The second and third links are to the landing page of the data. Although the last two links go to the same place, one is the DOI designation of the publication.
none
The zip file contains data in XLSX and CSV formats. The user must have software capable of uncompressing the zip file and reading the data formats.
20200908
U.S. Geological Survey
VeeAnn A. Cross
Marine Geologist
mailing and physical address
384 Woods Hole Rd.
Woods Hole
MA
02543-1598
508-548-8700 x2251
508-457-2310
vatnipp@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998